What’s the difference between 802.11b, 802.11g, 802.11a,
and Pre-N?
Currently there are four levels of wireless networking standards, which
transmit data at very different maximum speeds. Each is based on the
designation for certifying network standards. The most common wireless
networking standard, 802.11b, transmits information at 11Mbps; 802.11a
and 802.11g work at 54Mbps; and Pre-N works at 108Mbps. Pre-N, the
precursor to the upcoming 802.11n release, promises speeds that exceed
802.11g, and up to twice the wireless coverage area. See the following
chart for more detailed information.
Wireless Comparison Chart
Wireless
Technology
G
(802.11g)
G Plus MIMO
(802.11g with
MIMO MRC)
N MIMO
(draft 802.11n
with MIMO)
N1 MIMO
(draft 802.11n
with MIMO)
Speed/Data
Rate*
Up to
54Mbps*
Up to
54Mbps*
Up to
300Mbps*
Up to
300Mbps*
Frequency
Common
household
devices such
as cordless
phones and
microwave
ovens may
interfere with
the unlicensed
band 2.4GHz
Common
household
devices such
as cordless
phones and
microwave
ovens may
interfere with
the unlicensed
band 2.4GHz
Common
household
devices such
as cordless
phones and
microwave
ovens may
interfere with
the unlicensed
band 2.4GHz
Common
household
devices such
as cordless
phones and
microwave
ovens may
interfere with
the unlicensed
band 2.4GHz
Compatibility
Compatible
with 802.11b/g
Compatible
with 802.11b/g
Compatible
with draft
802.11n** and
802.11b/g
Compatible
with draft
802.11n** and
802.11b/g
Coverage* Up to 400 ft.* Up to 1,000 ft.* Up to 1,200 ft.* Up to 1,400 ft.*
Advantage
Common—
widespread
use for Internet
sharing
Better coverage
and consistent
speed and
range
Enhanced
speed and
coverage
Leading edge—
best coverage
and throughput
*Distance and connection speeds will vary depending on your networking environment.
